402123133 has 2 divisors, whose sum is σ = 402123134. Its totient is φ = 402123132.

The previous prime is 402123109. The next prime is 402123149. The reversal of 402123133 is 331321204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402122809 + 324 = 20053^2 + 18^2 .

It is a cyclic number.

It is not a de Polignac number, because 402123133 - 2⁵ = 402123101 is a prime.

It is equal to p_21443410 and since 402123133 and 21443410 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402123133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402121133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201061566 + 201061567.

It is an arithmetic number, because the mean of its divisors is an integer number (201061567).

Almost surely, 2^402123133 is an apocalyptic number.

It is an amenable number.

402123133 is a deficient number, since it is larger than the sum of its proper divisors (1).

402123133 is an equidigital number, since it uses as much as digits as its factorization.

402123133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 402123133 is about 20053.0080785901. The cubic root of 402123133 is about 738.1076148570.

Adding to 402123133 its reverse (331321204), we get a palindrome (733444337).

The spelling of 402123133 in words is "four hundred two million, one hundred twenty-three thousand, one hundred thirty-three".